This vintage JC Penny auto tele-converter lens is a rare find for any camera collector. Made in Japan, it comes with a case and caps, and is compatible with Pentax mounts. The lens has a zoom focal length and an auto focus type, making it perfect for capturing sharp and clear images. The maximum aperture is not known, but it is sure to affect the lens's performance. This item is a must-have for anyone looking to add a unique and high-quality lens to their collection.